What is the prime factorization of 7?
14
7×1
7 is a prime number i.e. it is divisible by 1 and 7 only.
Hence the prime factorisation of 7 is 7.
A number a has 7 as its smallest prime factor, and another number b has 3 as its smallest prime factor. What is the smallest prime factor of the number a−b?
A number a has 7 as its smallest prime factor, and another number b has 3 as its smallest prime factor. What is the smallest prime factor of the number a+b?